USCG Exam Practice · Passing distance and CPA from chart plot
A vessel is required to be fitted with an ARPA under 33 CFR §164.38. Which of the following specifications must the vessel's speed and distance indicating device meet?
- ASpeed errors must not exceed 2 percent of vessel speed or 0.2 knot, whichever is greater
- BSpeed errors must not exceed 5 percent of vessel speed or 0.5 knot, whichever is greater✓ correct
- CDistance errors must not exceed 10 percent of distance run or 1.0 nautical mile per hour, whichever is greater
- DSpeed errors must not exceed 5 percent of vessel speed or 1.0 knot, whichever is greater
Why B is correct
33 CFR §164.40(b)(2) specifies that speed errors must not exceed 5 percent of the speed of the vessel, or 0.5 knot, whichever is greater, when operating free from shallow water effect and from the effects of wind, current, and tide.
Cited:33 CFR §164.40
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